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ac3enc: Change EXP_DIFF_THRESHOLD to 500. 

This patch changes the exponent difference threshold in the exponent
strategy decision function of the AC-3 encoder.  I tested lowering in
increments of 100.  From 1000 down to 500 generally increased in quality
with each step, but 400 was generally much worse.

Signed-off-by: Mans Rullgard <mans@mansr.com>
This commit is contained in:
Justin Ruggles 2011-02-02 18:23:59 +00:00 committed by Mans Rullgard
parent 5fce60c3a9
commit c3beafa0f1
3 changed files with 3 additions and 3 deletions
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2
libavcodec/ac3enc.c
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@ -434,7 +434,7 @@ static void extract_exponents(AC3EncodeContext *s)
* Exponent Difference Threshold. * Exponent Difference Threshold.
* New exponents are sent if their SAD exceed this number. * New exponents are sent if their SAD exceed this number.
*/ */
#define EXP_DIFF_THRESHOLD 1000 #define EXP_DIFF_THRESHOLD 500
/** /**

2
tests/ref/acodec/ac3_fixed
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@ -1,2 +1,2 @@
9823c8f74097eab5d148cf0536ae932e *./tests/data/acodec/ac3.rm 37e119c644ba0472c079d0e907bf78df *./tests/data/acodec/ac3.rm
98751 ./tests/data/acodec/ac3.rm 98751 ./tests/data/acodec/ac3.rm

2
tests/ref/lavf/rm
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@ -1,2 +1,2 @@
e1990def7b195a568340f2c1a89d6587 *./tests/data/lavf/lavf.rm b97899ef2812cd1c8851dea550e042e4 *./tests/data/lavf/lavf.rm
346706 ./tests/data/lavf/lavf.rm 346706 ./tests/data/lavf/lavf.rm